An Alphabetical Summary of KAPPA Commands

ADD

Adds two NDF  data structures.

APERADD

Derives statistics of pixels within a specified aperture of an NDF.

ARDGEN

Creates a text file describing selected regions of an image.

ARDMASK

Uses an ARD file to set some pixels of an NDF to be bad.

ARDPLOT

Plots the boundaries of regions described in an ARD file over an existing picture.

AXCONV

Expands spaced axes in an NDF into the primitive form.

AXLABEL

Sets a new label value for an axis within an NDF data structure.

AXUNITS

Sets a new units value for an axis within an NDF data structure.

BEAMFIT

Fits beam features in a two-dimensional NDF.

BLOCK

Smooths a one- or two-dimensional image using a square or rectangular box filter.

CADD

Adds a scalar to an NDF data structure.

CALC

Evaluates a mathematical expression.

CALPOL

Calculates polarisation parameters.

CDIV

Divides an NDF by a scalar.

CENTROID

Finds the centroids of star-like features in an NDF.

CHANMAP

Creates a channel map from a cube NDF by compressing slices along a nominated axis

CHPIX

Replaces the values of selected pixels in an NDF.

CHAIN

Concatenates a series of vectorized NDFs.

CLINPLOT

Draws a spatial grid of line plots for an axis of a cube NDF.

CMULT

Multiplies an NDF by a scalar.

COLCOMP

Produces a colour composite image from 1, 2 or 3 individual NDFs.

COLLAPSE

Reduces the number of axes in an NDF by collapsing it along a nominated axis.

COMPADD

Reduces the size of an NDF by adding values in rectangular boxes.

COMPAVE

Reduces the size of an NDF by averaging values in rectangular boxes.

COMPICK

Reduces the size of an NDF by picking equally spaced pixels.

CONTOUR

Contours a two-dimensional NDF.

CONVOLVE

Convolves a pair of one- or two-dimensional NDFs together.

COPYBAD

Copies the bad-pixel mask from one NDF to another.

CREFRAME

Generates a test two-dimensional NDF from a selection of several types.

CSUB

Subtracts a scalar from an NDF data structure.

CUMULVEC

Sums the values cumulatively in a one-dimensional NDF.

CURSOR

Reports the co-ordinates of points selected using the cursor.

DISPLAY

Displays a one- or two-dimensional NDF.

DIV

Divides one NDF data structure by another.

DRAWNORTH

Draws arrows parallel to the axes.

DRAWSIG

Draws ${\pm}n$ standard-deviation lines on a line plot.

ELPROF

Creates a radial or azimuthal profile of a two-dimensional image.

ERASE

Erases an HDS object.

ERRCLIP

Removes pixels with large errors from an NDF.

EXP10

Takes the base-10 exponential of each pixel of an NDF.

EXPE

Takes the exponential of each pixel of an NDF (base e).

EXPON

Takes the exponential (specified base) of each pixel of am NDF.

FFCLEAN

Removes defects from a substantially flat one- or two-dimensional NDF.

FILLBAD

Removes regions of bad values from an NDF.

FITSDIN

Reads a FITS  disc file composed of simple, group or table objects.

FITSEDIT

Edits the FITS extension of an NDF.

FITSEXIST

Inquires whether or not a keyword exists in a FITS extension.

FITSEXP

Exports NDF-extension information into an NDF FITS extension.

FITSHEAD

Lists the headers of FITS files.

FITSIMP

Imports FITS information into an NDF extension.

FITSIN

Reads a FITS tape composed of simple, group or table files.

FITSLIST

Lists the FITS extension of an NDF.

FITSMOD

Edits an NDF FITS extension via a text file or parameters.

FITSTEXT

Creates an NDF FITS extension from a text file.

FITSURFACE

Fits a polynomial surface to two-dimensional data array.

FITSVAL

Reports the value of a keyword in the FITS extension.

FITSWRITE

Writes a new keyword to the FITS extension.

FLIP

Reverses an NDF's pixels along a specified dimension.

FOURIER

Performs forward and inverse Fourier transforms of one- or two-dimensional NDFs.

GAUSMOOTH

Smooths a one- or two-dimensional image using a Gaussian filter.

GDCLEAR

Clears a graphics device and purges its database entries.

GDNAMES

Shows which graphics devices are available.

GDSET

Selects a current graphics device.

GDSTATE

Shows the current status of a graphics device.

GLITCH

Replaces bad pixels in a two-dimensional image with the local median.

GLOBALS

Displays the values of the KAPPA global parameters.

HISCOM

Adds commentary to the history of an NDF.

HISLIST

Lists NDF history records.

HISSET

Sets the NDF history update mode.

HISTAT

Computes ordered statistics for an NDF's pixels using an histogram.

HISTEQ

Performs an histogram equalisation on an NDF.

HISTOGRAM

Computes an histogram of an NDF's values.

INTERLEAVE

Forms a higher-resolution NDF by interleaving a set of NDFs.

KAPHELP

Gives help about KAPPA.

KSTEST

Compares data sets using the Kolmogorov-Smirnov test.

LAPLACE

Performs a Laplacian convolution as an edge detector in a two-dimensional NDF.

LINPLOT

Draws a line plot of the data values in a one-dimensional NDF.

LISTMAKE

Creates a catalogue holding a positions list.

LISTSHOW

Reports the positions stored in a positions list.

LOG10

Takes the base-10 logarithm of each pixel of an NDF.

LOGAR

Takes the logarithm of each pixel of an NDF (specified base).

LOGE

Takes the natural logarithm of each pixel of an NDF.

LOOK

Outputs the values of specified NDF pixels to the screen or a text file.

LUCY

Performs a Richardson-Lucy deconvolution of a one- or two-dimensional array.

LUTABLE

Manipulates an graphics device colour table.

LUTBGYRW

Loads the BGYRW lookup table.

LUTCOL

Loads the standard colour lookup table.

LUTCOLD

Loads the cold lookup table.

LUTCONT

Loads a lookup table to give the display the appearance of a contour plot.

LUTEDIT

Creates or edits an graphics device colour table.

LUTFC

Loads the standard false-colour lookup table.

LUTGREY

Loads the standard grey-scale lookup table.

LUTHEAT

Loads the heat lookup table.

LUTIKON

Loads the default Ikon lookup table.

LUTNEG

Loads the standard negative grey-scale lookup table.

LUTRAMPS

Loads the coloured-ramps lookup table.

LUTREAD

Loads an graphics device lookup table from an NDF.

LUTSAVE

Saves the current colour table of an graphics device in an NDF.

LUTSPEC

Loads a spectrum-like lookup table.

LUTVIEW

Draws a colour-table key.

LUTZEBRA

Loads a pseudo-contour lookup table.

LUTWARM

Loads the warm lookup table.

MAKESNR

Creates a signal-to-noise array from an NDF with Variance.

MAKESURFACE

Creates a two-dimensional NDF from the coefficients of a polynomial surface.

MANIC

Converts all or part of an NDF from one dimensionality to another.

MATHS

Evaluates mathematical expressions applied to NDF data structures.

MEDIAN

Smooths a two-dimensional data array using a weighted median filter.

MEM2D

Performs a Maximum-Entropy deconvolution of a two-dimensional NDF.

MFITTREND

Fits independent trends to data lines that are parallel to an axis.

MLINPLOT

Draws a multi-line plot of the data values in a two-dimensional NDF.

MSTATS

Does cumulative statistics over a sequence of NDFs.

MULT

Multiplies two NDF data structures.

NATIVE

Converts an HDS object to native machine data representation.

NDFCOMPRESS

Compresses an NDF so that it occupies less disk space.

NDFCOPY

Copies an NDF (or NDF section) to a new location.

NDFTRACE

Displays the attributes of an NDF data structure.

NOGLOBALS

Resets the KAPPA global parameters.

NOMAGIC

Replaces all occurrences of magic value pixels in an NDF array with a new value.

NORMALIZE

Normalises one NDF to a similar NDF by calculating a scale factor and zero-point difference.

NUMB

Counts the number of elements of an NDF with values or absolute values above or below a threshold.

ODDEVEN

Removes odd-even defects from a one-dimensional NDF.

OUTLINE

Draws the outline of a two-dimensional NDF.

OUTSET

Sets pixels outside a specified circle in a two-dimensional NDF to a specified value.

PALDEF

Loads the default palette  to a colour table.

PALENTRY

Enters a colour into an graphics device's palette.

PALREAD

Fills the palette of a colour table from an NDF.

PALSAVE

Saves the current palette of a colour table to an NDF.

PARGET

Obtains the value or values of an application parameter.

PASTE

Pastes a series of NDFs upon each other.

PERMAXES

Permutes the axes of an NDF.

PICBASE

Selects the BASE picture from the graphics database.

PICCUR

Uses a cursor to select the current picture.

PICDATA

Selects the last DATA picture from the graphics database.

PICDEF

Defines a new graphics-database FRAME picture or an array of FRAME pictures.

PICEMPTY

Finds the first empty FRAME picture in the graphics database.

PICENTIRE

Finds the first unobscured and unobscuring FRAME picture in the graphics database.

PICFRAME

Selects the last FRAME picture from the graphics database.

PICGRID

Creates an array of FRAME pictures.

PICIN

Finds the attributes of a picture interior to the current picture.

PICLABEL

Labels the current graphics-database picture.

PICLAST

Selects the last picture from the graphics database.

PICLIST

Lists the pictures in the graphics database for a device.

PICSEL

Selects a graphics-database picture by its label.

PICTRANS

Transforms co-ordinates between the current and BASE pictures.

PICVIS

Finds the first unobscured FRAME picture in the graphics database.

PICXY

Creates a new FRAME picture defined by co-ordinate bounds.

PIXDUPE

Expands an NDF by pixel duplication.

PLUCK

Plucks slices from an NDF at arbitrary positions.

POW

Takes the specified power of each pixel of a data array.

PROFILE

Creates a one-dimensional profile through an n-dimensional NDF.

PROVADD

Stores provenance information in an NDF.

PROVMOD

Modifies provenance information for an NDF.

PROVREM

Removes selected provenance information from an NDF.

PROVSHOW

Displays provenance information for an NDF.

PSF

Determines the parameters of a model star profile by fitting star images in a two-dimensional NDF.

QUALTOBAD

Assigns bad values  to pixels with given qualities.

REGRID

Uses an arbitrary mapping to regrid an NDF.

REMQUAL

Removes named qualities  stored in an NDF QUALITY component.

RESHAPE

Reshapes an NDF, treating its arrays as vectors.

RIFT

Adds a scalar to a section of an NDF data structure to correct rift-valley defects.

ROTATE

Rotates a two-dimensional NDF about its centre through any angle.

SCATTER

Displays a scatter plot between data in two NDFs.

SEGMENT

Copies polygonal segments from one NDF to another.

SETAXIS

Sets values for an axis array component  within an NDF data structure.

SETBAD

Sets new bad-pixel flag  values for an NDF.

SETBB

Sets a new value for the quality bad-bits mask  of an NDF.

SETBOUND

Sets new bounds for an NDF.

SETEXT

Manipulates the contents of a specified NDF extension.

SETLABEL

Sets a new label  for an NDF data structure.

SETMAGIC

Replaces all occurrences of a given value in an NDF array with the bad value.

SETNORM

Sets a new value for one or all of an NDF's axis-normalisation flags.

SETORIGIN

Sets a new pixel origin  for an NDF.

SETQUAL

Assigns a specified quality to selected pixels within an NDF.

SETSKY

Stores WCS Information  in an NDF.

SETTITLE

Sets a new title for an NDF data structure.

SETTYPE

Sets a new numeric type for the DATA and VARIANCE components of an NDF.

SETUNITS

Sets a new units value for an NDF data structure.

SETVAR

Sets new values for the VARIANCE component  of an NDF data structure.

SHADOW

Enhances edges in a two-dimensional NDF using a shadow effect.

SHOWQUAL

Displays the named qualities stored in an NDF QUALITY component.

SLIDE

Shifts pixels in an NDF by a given amount along each axis.

SQORST

Squashes or stretches an NDF.

STATS

Computes simple statistics for an NDF's pixels.

SUB

Subtracts one NDF data structure from another.

SUBSTITUTE

Replaces all occurrences of a given value in an NDF array with another value.

SURFIT

Fits a polynomial or bi-cubic spline surface to two-dimensional data array.

THRESH

Edits an NDF such that array values below and above two thresholds take constant values.

TRANDAT

Converts free-format text data into an NDF.

TRIG

Performs a trigonometric transformation on an NDF.

VECPLOT

Plots a two-dimensional vector map.

KAPVERSION

Checks the version number of the installed package.

WCSADD

Creates a Mapping and optionally adds a new co-ordinate Frame  into the WCS component of an NDF.

WCSALIGN

Aligns a group of NDFs using WCS information.

WCSATTRIB

Manages attribute values associated with the WCS component of an NDF.

WCSCOPY

Copies WCS information from one NDF to another.

WCSFRAME

Changes the current co-ordinate Frame in the WCS component of an NDF.

WCSMOSAIC

Tiles a group of NDFs using World Co-ordinate System information.

WCSREMOVE

Removes co-ordinate Frames from the WCS component of an NDF.

WCSSLIDE

Applies a translational correction to the WCS in an NDF.

WCSSHOW

Examine the internal structure of a WCS description.

WCSTRAN

Transforms a position from one NDF co-ordinate Frame to another.

WIENER

Applies a Wiener filter to a one- or 2- dimensional array.

ZAPLIN

Replaces regions in a two-dimensional NDF by bad values or by linear interpolation.